Articles Archives

Specifying A Liquid-Liquid Heat Exchanger

Nov 07 2010 06:00 PM | Chris Haslego in Heat Transfer

As an engineer, specifying heat exchangers for procurement is an important step in the successful execution of any heat transfer or energy conservation project. Early recognition that there are many different heat transfer technologies available can he...

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Experienced Based Rules of Chemical Engineering

Nov 08 2010 01:00 PM | Chris Haslego in Calculations and Tips

Experience is typically what turns a good engineer into a great engineer. An engineer that can look at a pipe and a flowmeter and guess the pressure drop within 5%. Someone who can at least estimate the size of a vessel without doing any calculations....

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A Students Guide to Refining

Nov 08 2010 01:20 PM | Chris Haslego in Energy

Distillation is the first step in the processing of crude oil and it takes place in a tall steel tower called a fractionation column. The inside of the column is divided at intervals by horizontal trays. The column is kept very hot at the bottom (the c...

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Correlations for Convective Heat Transfer

Nov 08 2010 01:20 PM | bspang in Heat Transfer

In many cases it's convenient to have simple equations for estimation of heat transfer coefficients. Below is a collection of recommended correlations for single-phase convective flow in different geometries as well as a few equations for heat transfer...

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U in Heat Exchangers

May 10 2012 08:19 AM | bspang in Heat Transfer

Typical values of U are useful for quickly estimating the required surface area. The literature has many tabulations of such typical coefficients for commercial heat transfer services.

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Pneumatic Conveying Design

Nov 08 2010 01:00 PM | Chris Haslego in Bulk Solids

One of the most popular methods of moving solids in the chemical industry is pneumatic conveying. Pneumatic conveying refers to the moving of solids suspended in or forced by a gas stream through horizontal and/or vertical pipes. Pneumatic conveying ca...

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Wine and Wine Making

Aug 02 2010 12:57 PM | Chris Haslego in Other Topics

Wine is fermented grape juice. Wine can be made from grapes, fruits, berries etc. Most wine, though , is made from grapes. And no matter what the wine is made from, there must be fermentation, that is, that sugar be transformed into alcohol. If the amount of alcohol is relatively low, the result is wine. If it is high, the result is a "distilled liquor," something like gin or vodka.

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What is a Heat Pipe?

Nov 08 2010 01:20 PM | Chris Haslego in Other Topics

A heat pipe is a simple device that can quickly transfer heat from one point to another. They are often referred to as the "superconductors" of heat as they possess an extra ordinary heat transfer capacity and rate with almost no heat loss. The idea of...

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Refinery Planning and Optimization

Nov 08 2010 01:10 PM | Mukesh Sahdev in Energy

Modern optimization techniques have challenged organizations to rethink the way they conduct business both internally and externally, i.e. how efficiently and effectively their entire supply chain is managed. Supply Chain Management (SCM) is one such b...

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Design Considerations for Shell and Tube Heat E...

Nov 08 2010 01:30 PM | Chris Haslego in Heat Transfer

When preparing to design a heat exchanger, do you ever wonder where to start? You've done it before, but you hate that feeling of getting half way through the design and realizing that you forgot to consider one important element.The thought process i...

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Basics of Industrial Heat Transfer

Nov 08 2010 01:30 PM | Chris Haslego in Heat Transfer

Heat transfer is one of the most important industrial processes. Throughout any industrial facility, heat must be added, removed, or moved from one process stream to another. Understanding the basics of the heart of this operation is key to any enginee...

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Crystallization

Nov 08 2010 01:30 PM | Chris Haslego in Separation Technology

Crystallization refers to the formation of solid crystals from a homogeneous solution.Â It is essentially a solid-liquid separation technique and a very important one at that. Crystals are grown in many shapes, which are dependent upon downstream proc...

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Keeping Ejectors Online

Nov 08 2010 01:30 PM | Chris Haslego in Utilities

Steam jet ejectors offer a simple, reliable means of producing vacuum, and have a low installed cost as well. They are commonly found in process plants having available steam. The vacuum produced is useful for many processes, including evaporation, coo...

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Forms of Corrosion

Nov 08 2010 01:20 PM | Chris Haslego in Maintenance and Repair

Corrosion is costly! If you doubt this, then you probably have never been bitten by the "corrosion bug". Imagine specifying Titanium for 10 brand new heat exchangers or reactors and later realizing that the processing stream has fairly high concentra...

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Air Leak Testing Prior to Commissioning

Nov 08 2010 01:30 PM | Chris Haslego in Maintenance and Repair

Our message board is a constant source of great advice and information for all of our users. Some times, an especially useful discussion takes place that deserves a little extra attention. The inquiry and reply shownin this articlecan benefit process e...

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Optimize Liquid-Liquid Extraction

Nov 08 2010 12:40 PM | Madhavan in Separation Technology

Liquid-Liquid extractors are often a neglected part of process plants because they are not well understood and generally form only a small part of the overall process scheme. Often, significant savings in operating costs can be achieved by fine-tuning...

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